@monogrid/gainmap-js / libultrahdr / decodeJPEGMetadata

Function: decodeJPEGMetadata()

decodeJPEGMetadata(file): Promise<{ errorMessage: any; gainMap: any; metadata: string | ArrayBuffer | Int8Array<ArrayBufferLike> | Uint8Array<ArrayBufferLike> | Uint8ClampedArray<ArrayBufferLike>; parsedMetadata: GainMapMetadata; sdr: any; success: boolean; }>

Defined in: src/libultrahdr/decode-jpeg-metadata.ts:24

Decodes a JPEG file with an embedded Gainmap and XMP Metadata (aka JPEG-R)

Parameters

file

Uint8Array

A Jpeg file Uint8Array.

Returns

Promise<{ errorMessage: any; gainMap: any; metadata: string | ArrayBuffer | Int8Array<ArrayBufferLike> | Uint8Array<ArrayBufferLike> | Uint8ClampedArray<ArrayBufferLike>; parsedMetadata: GainMapMetadata; sdr: any; success: boolean; }>

The decoded data

Deprecated

Example

import { decodeJPEGMetadata } from '@monogrid/gainmap-js/libultrahdr'

// fetch a JPEG image containing a gainmap as ArrayBuffer
const gainmap = new Uint8Array(await (await fetch('gainmap.jpeg')).arrayBuffer())

// extract data from the JPEG
const { gainMap, sdr, parsedMetadata } = await decodeJPEGMetadata(gainmap)

Throws

if the provided file cannot be parsed or does not contain a valid Gainmap